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  #41  
Old 06-16-2010, 09:09 PM
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Originally Posted by ossagp View Post

After you have used that method to set a float just once, you will either record what the reading was afterwards, or find a source for the measurements, as it is a long way around.
thanks faded


ossagp, thanks for the info, that makes sense, using the hose the first time and then recording the measurement for future adjustments by fadeds way.

thanks again, happy motoing!!
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  #42  
Old 09-07-2010, 11:13 AM
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  #43  
Old 08-14-2011, 07:34 AM
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Default float hight 86 dr200

I got a 1986 Suzuki DR 200 with a BST-29 Mukiuni carb. Does any one know the float ajustment hight? I cant find it any where, and suzuki dealers in my area suck. They doint want to give me any info other than put it in there shop. Thank you for the show. Your thread answer all of my other questions.
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  #44  
Old 09-20-2011, 08:20 AM
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Man this is incredibly detailed. I need to check mine pronto since it is running so rich. Little worried about taking apart the float assembly tho but i need to check that fuel inlet needle. I didn't even know it existed!!

This is going to be a huge help!

Thanks

Dave
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  #45  
Old 09-20-2011, 11:11 AM
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don't be worried about it. I just did it on my Sons YZ125 and it was easy peazy. the biggest problem is just getting the float bowl off without stripping the threads... all the way..
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  #46  
Old 01-22-2012, 12:56 PM
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Must the line/mould on the float be parrellel with the carb (we're the gasket sits)
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  #47  
Old 01-22-2012, 04:34 PM
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that is pretty much the default setting if you don't have a correct factory setting to go by. is yours out of level when set at the factory setting? Mikunis are pretty easy to set using the parallel method fyi.
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  #48  
Old 02-11-2012, 10:36 PM
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WOW, huge thanks to Faded...I decided to man up and fully disassemble and clean my bike after doing my top end (had a mechanic friend help me do top end) but I pulled off the sub frame to fully clean, and then pulled the carb. Got it up to my room and as I took the bowl off the fuel inlet needle and pin fell into the bowl (smh)

The whole point of me taking the carb off was to try and familiarize myself with the float setup and make sure I was @ 16 mm...But of course my luck is it falls apart before I can even see it. At first I would just drop the fuel inlet needle into the valve seat and then put the floats on top of it so it wasn't contacting the actual spring, but instead the little wire that goes around...the floats were sitting on top of that and after getting a measurement of 25 mm I about sh!t my pants!!! LOL Then I found this thread, and looked very closesly at your pic of the fuel inlet needle and noticed the metal wire that goes over the top of the fuel inlet needle actually wraps around the float tang, and then the tang physically contacts the needle spring!!! At least I hope that is correct! LOL I just made a giant leap forward in my confidence of servicing this carb of mine. THANK YOU FADED!!! Keep great work like this coming for the guys like me!!

Griffin
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  #49  
Old 04-30-2012, 08:21 AM
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Default Awesome post Faded - What about other model carb?

Hey guys, I was hoping someone could confirm if Faded's instructions apply for the carb on the 1990 YZ250 I am rebuilding. I have never dealt with this model carb. It is the model that has two individual floats that are not connected to each other. Each float moves freely up/down along a guide and each float has a pin that rides on the two tang arms. The Clymer service manual doesn't seem that clear on the process and does not instruct to measure to the bottom of the float. I have model carb on my YZ 490 which corresponds to Faded's instructions. Thanks, Hitechman94
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  #50  
Old 04-30-2012, 08:41 AM
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that one is one of the best and easiest to service. you measure those right at the common yoke. the easy way is to take the floats bowl and floats off. turn the carburetor upside down top off. Now make sure each of the arms is level with the other, and set each to be completely parallel with the mating surface of the carburetor body and float bowl. check it pretty often, those do get where one arm is off from the other frequently, but once you have done it, it is fast and easy. check the needle and seat for crud and wear.
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  #51  
Old 07-04-2012, 12:37 PM
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Does anyone know the exact level that the fuel is supposed to be at in a Keihin PWK 38mm Airstriker? I made a measuring device out of a rubber plug and clear hose that I can stick into the bottom of the bowl where the threaded plug goes. With this I can check the exact fuel level inside the bowl but I don't know how high it is supposed to be. I have heard that the level should be right at the split between the bowl and carburetor body. Anyone know?
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  #52  
Old 09-19-2012, 08:03 PM
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Default Anyone ever tried this?

In the Yamaha manual it says you have to purchase a special tool to measure the proper fuel level in the carb bowl. Try this on for size. Just take one of Mama's tupperware bowls (she will love this), remove the carb bowl as shown. Open the fuel petcock and let fuel flow from the tank to the propped up carb until the fuel stops rising. Mark the spot where the fuel stops then measure compared to OEM specs.

It works on the same principle as the U-tube manometer tool that the dealer will sell you but no purchase required. Just maybe a chewing from your mother or wife. It may not be very precise but will let you know if you are in the neighborhood of correct fuel level in the bowl. My 02 YZ125 Manual indicates level 0.37-0.41" above bowl joint. Photos shows slightly low. You can view adjust as necessary.

Picture File attached I think!!
Attached Files
File Type: pdf Float measure.pdf (429.2 KB, 42 views)
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  #53  
Old 09-19-2012, 10:53 PM
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I never did measure a keihin with a site tube. on the pj and pwk it is just too easy to set at 16mm with a caliper. it is such a drag to set it with the tube, float bowl on, float bowl off, dumping it out, starting over etc etc etc.

that being said I would FAR,FAR,FAR prefer doing it with the easily made sight tube than running gas into a bowl and trying to guess the level. If it wasnt dangerous I would say it would be funny.

If you set your float to where the float arm and the float needle form as close to 90 degrees as possible, just as the spring loaded tip and tang on the float frame/arm come into contact you will have done what the factory does most of the time. a good place to start if you have no other. at that point you can use the fuel tube to check the level without taking the carburetor or the bowl off.

I am all for setting and checking often as the level starts moving with each ride. But the open bowl method is one I have never seen and hope not to see anyone do in practice. The genius that came up with it may be Einstein the second, but I want to make him a sign (if he hasn't already got one).
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  #54  
Old 09-20-2012, 03:48 PM
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Dangerous only if you are careless. This was just an alternate way for those that don't have the OEM tool and already have the carb apart to measure fuel height without trial and error on the float height. Yamaha does not give the float height from the bowl joint...only the fuel level from bowl joint. I thought it was pretty clever myself.
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  #55  
Old 09-20-2012, 05:17 PM
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Wow Kell. I guess since I first saw a person determine the volume of a rock by submersion I got used to the method and no longer see how clever it must have been. On careless: I can only guess at how far your knowledge goes in how fires can start. Unless you were grounded and or naked in the middle of a field and guaranteed to be able to remain alone during the entire process, then you were being careless. Now add to that you have your face over gas breathing fumes that were evaporating needlessly. Then of course you are wasting gas or contaminating it as we'll as a plastic item, well I am just figuring that maybe the fumes got to you and that was why you thought it was clever?

People that understand the purpose have been using the method I proposed far oftener than the one you ate impressed by. I can use that ones well as anyone else faster and easier and more consistently than the one you got wowed by. And it doesn't come with the same dangers. Period.

Last edited by ossagp; 09-20-2012 at 05:22 PM.
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  #56  
Old 09-20-2012, 07:32 PM
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Quote:
Originally Posted by ossagp View Post
Wow Kell. I guess since I first saw a person determine the volume of a rock by submersion I got used to the method and no longer see how clever it must have been. On careless: I can only guess at how far your knowledge goes in how fires can start. Unless you were grounded and or naked in the middle of a field and guaranteed to be able to remain alone during the entire process, then you were being careless. Now add to that you have your face over gas breathing fumes that were evaporating needlessly. Then of course you are wasting gas or contaminating it as we'll as a plastic item, well I am just figuring that maybe the fumes got to you and that was why you thought it was clever?

People that understand the purpose have been using the method I proposed far oftener than the one you ate impressed by. I can use that ones well as anyone else faster and easier and more consistently than the one you got wowed by. And it doesn't come with the same dangers. Period.
Thank you so much for setting me straight!
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  #57  
Old 09-27-2012, 07:13 AM
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Excellent job
Can you please re-load the pics
The Pictures are missing now sir
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  #58  
Old 09-29-2012, 10:12 AM
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Fixed broken photo links, my apologies for not getting to it sooner. Thank you.
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  #59  
Old 09-29-2012, 10:39 AM
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Quote:
Originally Posted by Faded View Post
Fixed broken photo links, my apologies for not getting to it sooner. Thank you.
If they were in your gallery, I thought I had messaged you that I wasn't renewing the site...sorry about that.
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  #60  
Old 09-29-2012, 04:55 PM
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Quote:
Originally Posted by Tdub View Post
If they were in your gallery, I thought I had messaged you that I wasn't renewing the site...sorry about that.
Tdub,

Don't even worry about it! It's not like I've been that great about keeping in touch either. I was sad to see the site gone though. I hope you are doing well old friend.
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